There are plenty of unanswered questions about the FBI spyware that, as we reported earlier this week, can be delivered over the Internet and implanted in a suspect's computer remotely.

Many of the questions hearken back to the old debate over the FBI's Carnivore wiretapping system, which technical luminaries Steve Bellovin, Matt Blaze, David Farber, Peter Neumann, and Eugene Spafford raised in a December 2000 paper.